Impacts of exogenous mineral silicon on cadmium migration and transformation in the soil-rice system and on soil health

Ma, Chunya; Ci, Kaidong; Zhu, Jian Hua; Sun, Zheng; Liu, Zixuan; Li, Xinyi; Zhu, Yelin; Tang, Cheng; Ping, Wang; Liu, Zhiming

doi:10.1016/j.scitotenv.2020.143501

Cited by 68 publications

(31 citation statements)

References 53 publications

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“…Phytoremediation is a safe and inexpensive biotechnique for overcoming the negative consequences and remediating Pb pollution in soils, as metal ions are thought to accumulate in the cell walls of roots (Sun and Luo, 2018). Previous studies demonstrated that the absorption and accumulation of Cd are higher in the roots than in the above-ground parts of low-Cd variety plants, which confirmed that the cell walls of roots are the binding sites for Cd 2+ and also act as a barrier for preventing the entry of ions into the cytoplasm (Wang et al, 2020;Ma et al, 2021). The plants used for phytoremediation usually have strong tolerance and can transport or adsorb contaminants under environmental stress (Gupta et al, 2013;Wu et al, 2013).…”

Section: Discussionmentioning

confidence: 91%

Overexpression of MePMEI1 in Arabidopsis enhances Pb tolerance

Zhou

Wang

et al. 2022

Front. Plant Sci.

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Pb is one of the most ubiquitously distributed heavy metal pollutants in soils and has serious negative effects on plant growth, food safety, and public health. Pectin methylesterase inhibitors (PMEIs) play a pivotal role in regulating the integrity of plant cell walls; however, the molecular basis by which PMEIs promote plant resistance to abiotic stress remains poorly understood. In this study, we identified a novel PMEI gene, MePMEI1, from Manihot esculenta, and determined its role in plant resistance to Pb stress. The expression of MePMEI1 was remarkably upregulated in the roots, stems, and leaves of cassava plants following exposure to Pb stress. An analysis of subcellular localization revealed that the MePMEI1 protein was localized in the cell wall. MePMEI1 inhibited commercial orange peel pectin methyltransferase (PME), and the expression of MePMEI1 in Arabidopsis decreased the PME activity, indicating that MePMEI1 can inhibit PME activity in the cell wall. Additionally, the overexpression of MePMEI1 in Arabidopsis reduced oxidative damage and induced the thickening of cell walls, thus contributing to Pb tolerance. Altogether, the study reports a novel mechanism by which the MePMEI1 gene, which encodes the PMEI protein in cassava, plays an essential role in promoting tolerance to Pb toxicity by regulating the thickness of cell walls. These results provide a theoretical basis for the MePMEI1-mediated plant breeding for increasing heavy metal tolerance and provide insights into controlling Pb pollution in soils through phytoremediation in future studies.

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Section: Discussionmentioning

confidence: 91%

Overexpression of MePMEI1 in Arabidopsis enhances Pb tolerance

Zhou

Wang

et al. 2022

Front. Plant Sci.

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“…Due to their ability to ion exchange, the silanol groups strongly immobilised heavy metals in the soil. Moreover, in the research by Ma et al [ 120 ], after the application of the clay mineral in the cultivated soil, the amount of organic matter decreased, suggesting that it favoured its decomposition and availability of organic matter and ultimately results in an increase in soil enzyme activity. Yang et al [ 121 ] observed the stimulation of the activity of oxidoreductase, alkaline phosphatase, and urease, enzymes responsible for the circulation of carbon, phosphorus, and nitrogen in soil enriched with clay minerals.…”

Section: Discussionmentioning

confidence: 99%

Mitigation of the Adverse Impact of Copper, Nickel, and Zinc on Soil Microorganisms and Enzymes by Mineral Sorbents

et al. 2022

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Despite numerous studies on the influence of heavy metals on soil health, the search for effective, eco-friendly, and economically viable remediation substances is far from over. This encouraged us to carry out a study under strictly controlled conditions to test the effects of Cu2+, Ni2+, and Zn2+ added to soil in amounts of 150 mg·kg−1 d.m. of soil on the soil microbiome, on the activity of two oxidoreductases and five hydrolases, and on the growth and development of the sunflower Helianthus annunus L. The remediation substances were a molecular sieve, halloysite, sepiolite, expanded clay, zeolite, and biochar. It has been demonstrated that the most severe turbulences in the soil microbiome, its activity, and the growth of Helianthus annunus L. were caused by Ni2+, followed by Cu2+, and the mildest negative effect was produced by Zn2+. The adverse impact of heavy metals on the soil microbiome and its activity was alleviated by the applied sorbents. Their application also contributed to the increased biomass of plants, which is significant for the successful phytoextraction of these metals from soil. Irrespective of which property was analysed, sepiolite can be recommended for the remediation of soil polluted with Ni2+ and zeolite—for soil polluted with Cu2+ and Zn2+. Both sorbents mitigated to the highest degree disturbances caused by the tested metals in the soil environment.

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“…Most reports emphasizing the impact of Si on R. solanacearum mainly focused on mining transcriptome changes and screening markers associated with resistance in plants [ 4 , 8 ]. Although Si is considered to play an important role in soil conditioning and nutrient supply [ 25 , 26 ], the interactions between the environment and peanut- R. solanacearum are very poorly studied [ 27 ]. Plant roots absorb important mineral nutrients and release organic exudates, such as fatty acids [ 28 ], plant hormones [ 29 ], and antimicrobial compounds [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

“…The metabolites secreted by soil microbes also, in turn, affect plant root functions [ 34 ]. In addition, soil physiochemical properties, enzyme activities, and microbial communities are important for soil health [ 26 ]. Thereby, the root–soil–microbe interaction is certainly important for plants, e.g., in the protection of plants from soil-borne diseases/insects [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Silicon Application for the Modulation of Rhizosphere Soil Bacterial Community Structures and Metabolite Profiles in Peanut under Ralstonia solanacearum Inoculation

Deng

Líu

et al. 2023

IJMS

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Silicon (Si) has been shown to promote peanut growth and yield, but whether Si can enhance the resistance against peanut bacterial wilt (PBW) caused by Ralstonia solanacearum, identified as a soil-borne pathogen, is still unclear. A question regarding whether Si enhances the resistance of PBW is still unclear. Here, an in vitro R. solanacearum inoculation experiment was conducted to study the effects of Si application on the disease severity and phenotype of peanuts, as well as the microbial ecology of the rhizosphere. Results revealed that Si treatment significantly reduced the disease rate, with a decrement PBW severity of 37.50% as compared to non-Si treatment. The soil available Si (ASi) significantly increased by 13.62–44.87%, and catalase activity improved by 3.01–3.10%, which displayed obvious discrimination between non-Si and Si treatments. Furthermore, the rhizosphere soil bacterial community structures and metabolite profiles dramatically changed under Si treatment. Three significantly changed bacterial taxa were observed, which showed significant abundance under Si treatment, whereas the genus Ralstonia genus was significantly suppressed by Si. Similarly, nine differential metabolites were identified to involve into unsaturated fatty acids via a biosynthesis pathway. Significant correlations were also displayed between soil physiochemical properties and enzymes, the bacterial community, and the differential metabolites by pairwise comparisons. Overall, this study reports that Si application mediated the evolution of soil physicochemical properties, the bacterial community, and metabolite profiles in the soil rhizosphere, which significantly affects the colonization of the Ralstonia genus and provides a new theoretical basis for Si application in PBW prevention.

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Impacts of exogenous mineral silicon on cadmium migration and transformation in the soil-rice system and on soil health

Cited by 68 publications

References 53 publications

Overexpression of MePMEI1 in Arabidopsis enhances Pb tolerance

Overexpression of MePMEI1 in Arabidopsis enhances Pb tolerance

Mitigation of the Adverse Impact of Copper, Nickel, and Zinc on Soil Microorganisms and Enzymes by Mineral Sorbents

Silicon Application for the Modulation of Rhizosphere Soil Bacterial Community Structures and Metabolite Profiles in Peanut under Ralstonia solanacearum Inoculation

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